• Persistent atrial fibrillation is associated with reduced risk of torsades de pointes in patients with drug-induced long QT syndrome. Dawood Darbar, John Kimbrough, Asif Jawaid, Robert McCray, Marylyn D. Ritchie, Dan M. Roden, 51, 8, 836-842, of the American College of Cardiology, 2008 Feb 26, PMID: 18294569 PMCID: PMC2271078,